Well in order to use the ServoTimeTimer1 library you have to move the line #include <wiring.h> from ServoTimeTimer1.h and place it the line after the #include <avr/interrupt.h> line in the ServoTimeTimer1.cppor you get the cryptic error:

This appears, then, to be a bug in the ServoTimeTimer1 library, rather than a problem with the Wiki page.

While the workaround should be documented until the library is fixed, you should also create a thread in the Software Bugs and Suggestions section, and/or try to contact the library author to get the library fixed, so the workaround is not needed.